Measurements: 28 x 21
x 15 mm
Description: Very unusually shaped small crystals of dioptase
(about 1.5 mm on edge) sit on small cubic, as well as drusy calcite crystals.
These, in turn, sit on a conglomerate calcite matrix.
No obvious damage.
Weight of Specimen: 8.3 g
Chemical Composition: Cu2+SiO2(OH)2 (dioptase)
Hardness on Mohs Scale: (dioptase) 5
Location: Tsumeb, Northern
Specimen Code: NTS 007
US $ 65